In recent years, the combination of two-line hybrid late rice has begun to be widely promoted in the southern provinces, such as Xiangliangyou 68, 65002, Eqiza No. 1, as well as Liangyupete, Peizaoqing, and Peiyou 288. In addition to the general cultivation characteristics of the three-line hybrid rice, these combinations also have some of their own characteristics, namely: strong temperature sensitivity, less elasticity of younger age, compact plant type, suitable for dense planting, and plant resistance to fertilizer and lodging, suitable for high yield and high yield. The late dry matter production and the amount of nitrogen uptake were significant, and grain filling was obvious in both sections. Rice smut was susceptible when heading and flowering. In order to obtain high yields of two-line hybrid rice, in addition to the various methods of high-yield cultivation of three-line hybrid rice, special attention should be paid to the following aspects.
one. Severe seed disinfection, elimination of species with pathogenic water source selection and water presoaking for 12 hours, must be sterilized with strong chlorine and other agents. After disinfection, flush the seeds with clean water.
two. Timely planting, strictly controlling the suitable sowing date for the younger population of Liangyoupeite and Peizashanqing in the Longnan region from June 23 to June 25, and the appropriate sowing period for the southern Minnan Region (including the Nanchang Region) from June 18 to On the 22nd. Peiyoupite and Peizashanqing were sowed about 5 days later. The sowing volume of 8-667 kg (1 mu) is 8-10 kg. The younger age of Liangyupete and Peizashanqing is 28-32 days, while that of Peiliangyou 288 is 25-28 days. The Peiliangyou 288 can be sowed at the end of June or the beginning of July, and the larvae are controlled within 20 days.
three. Plant 13 cm x 20 cm in suitable planting specifications to ensure that every 667 square meters has 22,000-2.5 million baht, 2 grains per pot, and 80,000-10 million basic seedlings (including 2 leaves and more than one heart).
four. The scientific fertilization of two lines of rice has a lot of dry matter production and fertilizer absorption in the later period, and it should pay attention to the middle and late fertilization. Every 667 square meters of pig manure 1000-1500 kilograms, or 200-250 kilograms of fresh straw return, or cake fat 40-50 kilograms, plus 30-40 kilograms of calcium magnesium phosphate fertilizer and 8-9 kilograms of urea as a basic fertilizer. After planting 5-7 days combined with cultivating and weeding, urea 4-5 kg ​​per 667 square meters, potassium chloride 7.5 kg for pudding; 30-32 days after planting, urea 4-5 kg ​​per 667 square meters, potassium chloride 2-3 kilograms for the protection of manure; ear to ear, apply urea 2-2.5 kg per 667 square meters for strong seed fertilizer.
Fives. Leading the field, dry, wet, wet and strong seeds when the total number of stalks per 667 square meters of the field two yipute and Peizashan reached 60,000 -18 million seedlings. When Peiliangyou 288 reached about 200,000 seedlings, it began to drain the field and put it on the ground several times. When the tip of the tip of the tip of the inverted 2 leaf, it was recharged with shallow water until the head of the rice ear was mixed. For 3-5 days, replenish the thin water and strengthen the seeds. Open the ditch and cut off the water one week before cutting. The two lines have large heads of rice and the grouting phenomenon is obvious in two sections.
six. Prevention of rice smut disease before heading 7-10 days, with 14% of ammonia copper 400 liters or 20% Triadin 75 liters, 50-60 kg of water spray. Note that the concentration should not be too high, otherwise it will hurt the leaves.
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